Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0208—Tissues; Wipes; Patches
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
  • A61K8/062—Oil-in-water emulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
  • A61K8/068—Microemulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/31—Hydrocarbons
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/37—Esters of carboxylic acids
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
  • A61K8/4993—Derivatives containing from 2 to 10 oxyalkylene groups
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/86—Polyethers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q15/00—Anti-perspirants or body deodorants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
  • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
  • C09K23/34—Higher-molecular-weight carboxylic acid esters
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
  • C11D17/0017—Multi-phase liquid compositions
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
  • C11D17/0017—Multi-phase liquid compositions
  • C11D17/0021—Aqueous microemulsions
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0043—For use with aerosol devices
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/52—Stabilizers

Definitions

• the invention relates to cold-producible long-term stable, low-viscosity, finely divided oil-in-water emulsions, the production of preferably clear oil phases or preferably clear to transparent microemulsion-like concentrates, the corresponding oil phases or microemulsion-like concentrates and the use of the emulsions according to the invention for the preparation of cosmetic, dermatological or pharmaceutical preparations and for the preparation of cleansing and care emulsions for household and industry, in particular for the production of impregnating emulsions for wet wipes or for sprayable care emulsions.
• the finely divided oil-in-water emulsions according to the invention are preferably free of polyethylene glycol-containing substances ("PEG-free") and contain an emulsifier mixture consisting of a primary nonionic emulsifier component, preferably polyol partial esters, and a secondary neutralizable emulsifier component, moreover surfactant cosurfactants, preferably aromatic cosurfactants having preservative properties, and furthermore oils, preferably esters and / or ether oils and optionally further customary auxiliaries and additives.
• PEG-free polyethylene glycol-containing substances
• Emulsions are an important product type in the field of cosmetic, dermatological and / or pharmaceutical preparations.
• Cosmetic preparations are used essentially for skin care. Skin care in the cosmetic sense is first and foremost that the natural function of the skin as a barrier against environmental influences (for example Dirt, chemicals, microorganisms) and against the loss of endogenous substances (such as water, natural fats, electrolytes) is strengthened and / or restored.
• the aim of skin care is also to compensate for the loss of fat and water caused by daily washing of the skin and to maintain or restore the softness and smoothness of the skin. This is especially important when the natural regeneration capacity is insufficient.
• skin care products should protect against environmental influences, especially from the sun and wind, and retard skin aging.
• compositions typically contain one or more drugs in effective concentration.
• drugs for the sake of simplicity, reference is made to the clear distinction between cosmetic and medical use and corresponding products to the statutory provisions of the Federal Republic of Germany (for example, Cosmetics Regulation, Food and Medicines Act).
• the PIT method takes advantage of the fact that in an oil-in-water (O / W) emulsion, which is stabilized by nonionic, polyethylene glycol-containing emulsifiers ("PEG-containing emulsifiers”) by phase elevation a phase inversion to a Water-in-oil (W / O) emulsion can be induced (phase inversion, PIT: phase inversion temperature).
• O / W oil-in-water
• PEG-containing emulsifiers polyethylene glycol-containing emulsifiers
• the finely divided and low-viscosity emulsions produced in this way have excellent long-term stability and are thus very suitable as impregnation solutions for wet wipes.
• Such systems are for example in EP-B-1 268 740 or in WO-A-00/04230 described.
• a basic requirement for using the PIT emulsification technique is that the entire emulsion must be heated to temperatures above the phase inversion temperature and subsequently cooled again.
• ethoxylated emulsifiers provide a rather watery skin feel, which can be sensibly improved by the use of, for example, polyglycerol esters.
• mixtures of alkylparaben esters and phenoxyethanol are used in this case typically, as are commercially available, for example under the trade name Euxyl K 300 ® (Schulke & Mayr) or Phenonip ® (Clariant).
• low-viscosity, finely divided and long-term stable oil-in-water emulsions which are outstandingly suitable for use as impregnating emulsions or in sprayable systems can be prepared at room temperature, if a suitable combination of emulsifiers based on polyol partial esters and neutralizable acid partial esters together with oils, preferably esters and / or ether oils and cosurfactants, preferably aromatic cosurfactants having preservative properties.
• emulsions in addition to their ease of preparation and their fine degree of dispersion, are characterized by being substantially free of ethoxylated ingredients ("PEG-free" emulsion systems).
• PEG-free emulsion systems ethoxylated ingredients
• wet wipes produced with the aid of these impregnation solutions are distinguished by extremely pleasant sensory properties.
• PEG-free, low-viscosity and finely divided emulsions which can be prepared at room temperature are available for the first time, which are simultaneously sufficiently conserved and long-term stable by the preferred use of preservative aromatic cosurfactants and are thus especially suitable for use as an impregnation emulsion suitable for wet wipes.
• Emulsions preferred according to the invention are of low viscosity, finely divided and long-term stable.
• low-viscosity is meant a viscosity which makes it possible to spray the emulsions with conventional equipment.
• these are emulsion viscosities ⁇ 4000 mPas (Brookfield RVT, Spindle 4, 10 rpm (20 ° C)), preferably ⁇ 2500 mPas, particularly preferably s 1000 mPas. Higher viscosities are adjustable, but not preferred according to the invention.
• finely divided is meant an average radius of the emulsion droplets of ⁇ 20- ⁇ 500 nm, preferably of ⁇ 30- ⁇ 200 nm, and more preferably of ⁇ 40- ⁇ 120 nm.
• Long-term stable is understood to mean that the emulsions according to the invention can be stored for three months at room temperature and for 1 month at 40 ° C. without irreversible creaming or other signs of instability.
• the oil-in-water emulsions of the invention usually have a water phase content of ⁇ 70- ⁇ 99 wt .-%, preferably from ⁇ 80- ⁇ 97 wt .-%.
• water phase For the water phase, one expects all substances of a formulation which, because of their hydrophilic character, can be added to this phase or dissolved or dispersed in it. Based on the oil-in-water emulsions according to the invention, therefore, water or any constituents, such as glycols, polyalkylene glycols, glycerol, polyglycerols, alcohols, water-soluble polymers or active ingredients, in each case belong to the aqueous phase.
• any constituents such as glycols, polyalkylene glycols, glycerol, polyglycerols, alcohols, water-soluble polymers or active ingredients
• the emulsifier mixture (A), the cosurfactants (B) and the oils (C) are preferably in parts by weight (based on these three components) of (A) ⁇ 10- ⁇ 30 / (B) ⁇ 3- ⁇ 20 / (C) ⁇ 50- ⁇ 87, and more preferably in weight proportions of ⁇ 20- ⁇ 25 / ⁇ 5- ⁇ 15 / ⁇ 60- ⁇ 75, wherein the emulsifier mixture (A) is composed of ⁇ 75- ⁇ 99 , 5 wt .-% of nonionic primary emulsifier (a) and ⁇ 0.5- ⁇ 25 wt .-% acid group-containing secondary emulsifier (b).
• the major part of the nonionic primary emulsifier component (a) consists of polyglycerol esters, preferably sorbitan esters in an amount of ⁇ 0- ⁇ 75 wt .-%, preferably ⁇ 0- ⁇ 50 wt .-%, particularly preferably ⁇ 0- ⁇ 25 wt .-%, based on total primary emulsifier (a), admixed become.
• polyglycerol and sorbitan partial esters which contain fatty acid residues having a chain length of ⁇ 10 to ⁇ 18 C atoms as hydrophobic portions.
• the emulsifiers of type (b) are preferably present in the emulsifier formulation in at least partially neutralized form. They are advantageously already used as (partially) neutralized components. If desired, however, the neutralization step can also take place in a suitable subsequent process step, wherein bases are preferably used for neutralization, which are anionic emulsifiers with mono- or dihydric lead cationic counterions. Particularly preferred counterions are sodium and potassium.
• Neutralized citric acid partial esters are preferably used whose hydrophobic radicals each contain ⁇ 10 to ⁇ 18 carbon atoms.
• cosurfactants are understood as meaning, in particular, those compounds which are distinguished by interfacial activity, which can manifest themselves in the lowering of interfacial tensions or the incorporation into interfacial films, without these substances, however taken alone, to micellarize the aggregation typical of surfactants Structures in water or would show the typical for emulsifiers stabilization of emulsion droplets.
• cosurfactants are also or alternatively understood as meaning in particular those compounds which have an HLB value according to Griffins of between ⁇ 4 to ⁇ 10. These cosurfactants are particularly preferably distinguished by an octanol-water partition coefficient log P or log K ow which lies between 1 and 2.
• the octanol-water partition coefficient is calculated from the decadic logarithm of the quotient of the amount of a substance dissolved in equilibrium at room temperature in octanol and in water (see: Ullmann's Encyclopedia of Industrial Chemistry, Volume B 7, (Volume Editor: E. Weise), 5th edition, VCH, Weinheim 1995, p. 78 ,
• the cosurfactants according to the invention are nonionic organic compounds having 4 to 14 C atoms which contain one or more polar groups in the molecule.
• Typical known non-aromatic cosurfactants are aliphatic alcohols such as butanol, pentanol, hexanol, octanol, hexanediol or octanediol.
• the cosurfactants used are n-pentanol, n-hexanol, 1,2-hexanediol, 1,2-heptanediol or 1,2-octanediol.
• aromatic cosurfactants are used as cosurfactants.
• aromatic cosurfactants are understood as meaning, in particular, surface-active substances which contain one or more aryl groups and which, when taken alone, do not form micellar structures in water.
• these aromatic cosurfactants are additionally distinguished by antimicrobial properties, ie they are aromatic cosurfactants having preservative properties.
• aromatic cosurfactants having preservative properties make it possible to prepare O / W emulsions according to the invention which ideally can be obtained without further preservatives.
• preservative as auxiliaries and additives
• Phenoxyethanol and benzyl alcohol are especially preferred according to the invention as aromatic cosurfactants with preserving properties.
• alkylparaben esters preferably methylparaben, ethylparaben, propylparaben, isopropylparaben, butylparaben and / or isobutylparaben
• Particularly preferred is the use of mixtures of alkylparaben and phenoxyethanol, as are commercially available, for example under the trade name Euxyl K 300 ® (Schulke & Mayr) or Phenonip ® (Clariant) is.
• mixtures of said preservative aromatic cosurfactants may also be used with other suitable preservatives.
• a mixture of phenoxyethanol and ethylhexylglycerol can also be used, as is commercially available under the name Euxyl PE 9010 (Schülke & Mayr).
• Guerbet alcohols based on fatty alcohols containing 6 to 20, preferably 8 to 10, carbon atoms, esters of linear C1-C44 fatty acids with linear C1-C22 fatty alcohols, esters of branched C1 C44 carboxylic acids with linear C1-C22 fatty alcohols, esters of linear C1-C44 fatty acids with branched alcohols, esters of linear and / or branched fatty acids with polyhydric alcohols and / or Guerbet alcohols, triglycerides based on C1-C44 fatty acids, vegetable oils , branched primary alcohols, substituted cyclohexanes, Guerbet carbonates, dialkyl (ene) ethers, dialkyl (ene) carbonates and / or aliphatic or naphthenic Hydrocarbons, silicone oils, dimethicones, cyclomethicones, ethoxylated and
• the oils used are ester oils, ether-based oils, hydrocarbons and also propoxylated organic alcohols and mixtures of these compounds.
• ester oils are mono- or diesters of linear and / or branched mono- and / or dicarboxylic acids having ⁇ 2 to ⁇ 44 carbon atoms with linear and / or branched (in particular 2-ethylhexanol), saturated or unsaturated alcohols with ⁇ 1 to ⁇ 22 C-atoms into consideration.
• esterification products of aliphatic, difunctional or trifunctional alcohols in particular dimerdiol and / or trimerdiol
• ester oils which contain aromatic groups are also suitable.
• ester oils that are waxy at room temperature such as myristyl myristate
• myristyl myristate can result in a richer skin feel of the emulsions.
• Suitable ether oils are, in particular, dialklyl ethers having ⁇ 4 to ⁇ 24 C atoms.
• Saturated C6-C18 dialkyl ethers such as, for example, di-n-octyl ether, di (2-ethylhexyl) ether, lauryl methyl ether or octyl butyl ether, and didodecyl ether are preferably suitable according to the invention.
• Particularly preferred oil components are the cosmetic ester oils ethylhexyl palmitate, ethylhexyl stearate, decyl cocoate, diethylhexyl carbonate, dioctyl carbonate, cetearyl ethylhexanoate, decyl oleate, isocetyl palmitate, cetearyl isononanoate, hexyl laurate, isopropyl isonononoate, isopropyl palmitate, isoproyl myristate, isopropyl laurate and C12-15 alkyl benzoate, as well as the cosmetic ether oil dicaprylyl ether and the propoxylated organic alcohols PPG15 Stearyl ether or PPG-4 butyl ether and mixtures of the compounds mentioned.
• the cosmetic ester oils ethylhexyl palmitate, ethylhexyl stearate, decyl cocoate,
• polar solubilizers are understood in particular to be polar compounds which are added in amounts of up to 10% by weight to the oil phases described below in order to obtain clear oil phases.
• These are preferably water, glycols, polyalkylene glycols, glycerol, polyglycerol or short-chain alcohols, such as ethanol or isopropanol.
• auxiliaries and additives all known to those skilled in the art as auxiliaries and additives such as oils and waxes, commercial surfactants or emulsifiers, bodying agents, thickeners such as polymer-based, inorganic and organic UV sunscreen, self-tanner, pigments, antioxidants , Hydrotropes, deodorant and antiperspirant active ingredients, active ingredients, dyes, additional preservatives and perfumes are used, such as in DE102005011785.6 are described.
• auxiliaries and additives such as oils and waxes, commercial surfactants or emulsifiers, bodying agents, thickeners such as polymer-based, inorganic and organic UV sunscreen, self-tanner, pigments, antioxidants , Hydrotropes, deodorant and antiperspirant active ingredients, active ingredients, dyes, additional preservatives and perfumes are used, such as in DE102005011785.6 are described.
• auxiliaries and additives can be added to both the oil and the water phase or the dilution water in the production process of the emulsion.
• tocopherol tocopherol acetate, tocopherol palmitate, ascorbic acid, deoxyribonucleic acid, coenzyme Q10, retinol and retinyl derivatives, bisabolol, allantoin, phytantriol, panthenol, AHA acids, amino acids, hyaluronic acid, creatine (and creatine derivatives), guanidine (and guanidine derivatives) are particularly active substances.
• the O / W emulsions according to the invention can in principle be produced using a simple stirring tool. In this case, no additional homogenization step is needed.
• the preparation is preferably carried out at room temperature by directly pouring a clear, single-phase oil phase containing an emulsifier mixture, cosurfactants, oils and possibly conventional auxiliaries and additives into the dilution water.
• the oil phase can be converted to a clear phase by adding up to 10% by weight of a polar solubilizer.
• polar solubilizers can be water, glycols, polyalkylene glycols, glycerol, polyglycerols or short-chain alcohols such as ethanol or isopropanol.
• water is used as the polar solubilizer.
• Homogeneous, clear oil phases are advantageous for producing finely divided O / W emulsions according to the invention.
• the use of turbid oil phases usually leads to coarser emulsions whose long-term stability is often inadequate. The transition from clear to cloudy oil phases is flowing.
• the degree of turbidity, at which still emulsions with sufficient long-term stability can be produced, is dependent on the type and amount of the used Components and in these borderline cases to be determined individually.
• fine-particle oil-in-water emulsions according to the invention can also be carried out via the intermediate stage of a clear to transparent microemulsion-type concentrate.
• this concentrate consists of> 30-.ltoreq.90% by weight of oil phase, preferably of .gtoreq.40.ltoreq.80% by weight of oily phase, comprising an emulsifier mixture, cosurfactants, oils and optionally polar solubilizers and / or customary auxiliaries and additives.
• These clear to transparent microemulsion-type concentrates are preferably prepared at room temperature by stirring water into the oil phase.
• For the preparation of these concentrates and cloudy oil phases can be used.
• the optimum water content of the concentrates is dependent on the recipe (for example on the oil used), but is generally ⁇ 10- ⁇ 70% by weight, preferably ⁇ 20- ⁇ 60% by weight.
• microemulsion-type concentrates may eventually be diluted to oil-in-water emulsions of the invention.
• Both the preparation of the microemulsion-type concentrates and the final dilution step can be carried out at room temperature using a simple stirring tool.
• oil phases can be prepared by the known methods of the prior art. For example, depending on the consistency and concentration of the components used, the oil phases can be prepared at temperatures in the range of ⁇ 20 to ⁇ 75 ° C by simply mixing the components. These oil phases are useful at room temperature for the preparation of the oil-in-water emulsions of the present invention.
• Another object of the invention is a process for the preparation of inventive oil-in-water emulsions, which is characterized in that these clear oil phases preferably at temperatures below 40 ° C, in particular room temperature, with a corresponding water phase under known conditions to a Total water phase content of ⁇ 70 wt .-%, preferably ⁇ 80 wt .-%, is set.
• Another object of the invention is a process for the preparation of inventive oil-in-water emulsions, which is characterized in that these microemulsion-like concentrates preferably at temperatures below 40 ° C, in particular room temperature, with a corresponding aqueous phase under known conditions to a Total water phase content of ⁇ 70 wt .-%, preferably ⁇ 80 wt .-%, is set.
• Another object of the invention is the use of the emulsions according to the invention for the preparation of cosmetic, dermatological or pharmaceutical preparations.
• the use as impregnation solutions for the production of wet wipes, especially of cosmetic wet wipes for the care and cleaning of the skin is in the foreground.
• Another object of the invention is the use of the emulsions in cosmetic cleansing and care preparations for skin and skin appendages.
• the focus is on the use in sprayable preparations, as they are for example for facial and personal care products, baby care, sunscreen preparations, make-up remover and antiperspirants / deodorants.
• oil-in-water emulsions according to the invention are also outstandingly suitable both for the production of cleaning and care wipes and for direct application in the form of sprayable emulsion systems for cleaning and care of surfaces in household and industry, such as the textile care, leather care, the care and cleaning of metallic or non-metallic surfaces, for example for the cleaning and care of automobiles or furniture.
• Another object of the invention is therefore the use of the emulsions for the production of cleaning and care products for household and industry, such as textiles, leather, plastics, metallic and non-metallic surfaces.
• the use as impregnation solutions for the production of wet wipes and the use in sprayable preparations is in the foreground.
• the technical teaching described here makes it possible in a simple manner at room temperature to prepare PEG-free, low-viscosity, fine-particle and long-term stable oil-in-water emulsions which already have adequate preservation.
• the acid partial ester (b) used as part of the emulsifier mixture from the beginning, at least in partially neutralized form.
• this neutralization step it is also possible to carry out this neutralization step at a later point in the preparation process and to work first with the unneutralized acid partial esters.
• Emulsifier 1 Emulsifier component A: 97% Polyglyceryl-4 Laurate 1) Emulsifier component B: 3% dilauryl citrate 2) Emulsifier 2: Emulsifier component A: 96% polyglyceryl-4 laurate 1) Emulsifier component B: 4% dilauryl citrate 2) Emulsifier 3: Emulsifier component A: 95% polyglyceryl-4 laurate 1) Emulsifier component B: 5% dilauryl Citrate 2) Emulsifier 4: Emulsifier component A: 92% polyglyceryl-4 laurate 1) Emulsifier component B: 8% dilauryl citrate 2) Emulsifier 5: Emulsifier component A: 98.5% polyglyceryl-4 laurate 1) Emulsifier component B: 1.5% Disodium Lauryl Sulfosuccinate
• Emulsions 1-24 are intended to exemplify the structure of emulsions according to the invention (data in% by weight).
• Emulsions 1-10 were prepared by pouring the clear oil phases (Examples 1-10 (supra)) in water at room temperature using a simple manual stirrer.
• Emulsions 11-20 were also prepared at room temperature by diluting the clear to transparent microemulsion concentrates (corresponding Examples 1-10 (supra)) using a simple manual stirrer.
• Exemplary Emulsions 21-24 are based on clear oil phases 2 and 3 and were prepared therefrom by dilution with blending.
• the water phase was exemplarily water-soluble auxiliaries and additives buried.
• perfume was added as auxiliary and additive according to the invention, which could be readily dissolved in the appropriate amounts in the clear oil phases or in clear to transparent microemulsion-like concentrates.
• emulsions are low-viscosity, fine-particle and long-term stable.
• the particle size of individual example emulsions was characterized with the aid of dynamic light scattering.
• Dynamic light scattering is based on the analysis of the variations in the scattered light intensity of diffusing particles in solution.
• the diffusion coefficient of the particles in solution can be determined, which can be converted by the Stokes-Einstein equation into a mean hydrodynamic radius ⁇ r h > of the particles (here: emulsion droplets).
• example emulsions mentioned were diluted with deionized water by a factor of 10 and characterized using a Dynamic Light Scaler from Malvern Instruments (HPPS 3.1) at 25 ° C. In each case, the mean values from three measurements each with 100 seconds measurement time are given.

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• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
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• 2006
  • 2006-01-30 DE DE102006004353A patent/DE102006004353A1/de not_active Ceased
  • 2006-12-13 IL IL180035A patent/IL180035A/en active IP Right Grant
• 2007
  • 2007-01-17 EP EP07000844A patent/EP1813251A3/fr not_active Withdrawn
  • 2007-01-24 JP JP2007014083A patent/JP2007203288A/ja active Pending
  • 2007-01-24 US US11/657,265 patent/US8795692B2/en not_active Expired - Fee Related
  • 2007-01-29 CN CN2007100083790A patent/CN101011318B/zh not_active Expired - Fee Related
  • 2007-01-30 BR BRPI0700148-7A patent/BRPI0700148A/pt not_active Application Discontinuation

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